This document provides an introduction and overview of LINQ (Language Integrated Query). It defines LINQ as allowing developers to write SQL queries using a simple language like C# without needing to learn SQL. LINQ provides a unified syntax for querying multiple data sources. The document outlines the structure of a LINQ query, shows how to write one, and lists the stages of executing a query. Advantages include a consistent syntax across data sources and syntax highlighting. Examples demonstrate creating a data context class and querying data from a database and objects.

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LINQ

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4. Introduction
• LINQ stands for Language-Integrated Query
• It is simply a unified programming model for writing
SQL queries in simple language(C#,VB,etc) without
learing SQL.

5. LINQ contd..
• It has a single unitive syntax for querying multiple
data sources.
• It uses a declarative syntax that allows developers to
tell the compiler what to do.

6. Structure of LINQ

7. How Write Linq query ?
Var variablename=
from tempvariable
in dataSource
Where condition
Select columns

8. Stages of the Query
1. Obtain the data source for the query
2. Create the query
3. Execute query

9. Advantage
• LINQ syntax is same, when querying multiple data
sources.
• it provides syntax highlighting.

10. Example 1
create dataContext class

11. Datacontext class

12. Data from db

13. output

14. Data From object

15. Contd..

16. Thank you

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